I used this product for my new puppy for training. She is 3 mos old lab. She immediately pulled off an entire portion of the wire as it was very flimsy and the wires were not secured enough to each other. And the material isnt the right material to be able to sature the two wires together instead we have them held together by a string.  It is large and the divider is nice but it is flimsy i even pulled on of the wires apart just putting the divider in place.  I wouldnt recommend this unless you are going to buy a small one for a small dog that will not chew.